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Dilution and Percentages Problem

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A restaurant manager has 2 liters of white wine that is 12% alcohol. How many liters of grape juice should he add to get a drink that is 10% alcohol?

I've got it this far but, can's break it down farther. Can you break it down and explain how you did it?

2(0.12) + x(0)= 0.10(2 + x)

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A restaurant manager has 2 liters of white wine that is 12% alcohol. How many liters of grape juice should he add to get a drink that is 10% ...

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